Home / 15,690.36-21,635.28-15,327.48

Finding the Fourth Proportional to 15,690.36, 21,635.28 and 15,327.48

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Solution

The fourth proportional to 15,690.36, 21,635.28 and 15,327.48 is: 21,134.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.36 : 21,635.28 = 15,327.48 : x
  2. Step 2: Convert to fraction form
    15,690.36/21,635.28 = 15,327.48/x
  3. Step 3: Cross multiply
    15,690.36x = 21,635.28 × 15,327.48
  4. Step 4: Simplify right side
    15,690.36x = 331,614,321.49
  5. Step 5: Solve for x
    x = 331,614,321.49/15,690.36
  6. Step 6: Final answer
    x = 21,134.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.